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Tap Size	Diameter (")	Diameter (mm)	Thread Count (TPI)	Thread Pitch (mm)	Tap Drill Size
#00-90	0.0470	1.1938	90	0.282	#65
#0-80	0.0600	1.15240	80	0.318	3/64"
#1-64	0/0730	1.8542	64	0.397	#52
#1-72	0.0730	1.8542	72	0.353	#53
#2-56	0.0860	2.1844	56	0.454	#50
#2-64	0.0860	2.1844	64	0.397	#50
#3-48	0.0990	2.5146	48	0.529	#47
#3-56	0.0990	2.5146	56	0.454	#45
#4-40	0.1120	2.8448	40	0.635	#43
#4-48	0.1120	2.8448	48	0.529	#42
#5-40	0.1250	3.1750	40	0.635	#39
#5-44	0.1250	3.1750	40	0.577	#37
#6-32	0.1380	3.5052	32	0.794	#36
#6-40	0.1380	3.5052	40	0.635	#33
#8-32	0.1640	4.1656	32	0.794	#29
#8-36	0.1640	4.1656	36	0.706	#29
#10-32	0.1900	4.8260	32	0.794	#21
#10-24	0.1900	4.8260	24	1.058	#25
#12-28	0.2160	5.4864	28	0.907	#15
1/4-20	0.2500	6.3500	20	1.270	#7
1/4-28	0.2500	6.3500	28	0.907	#3
5/16-18	0.3125	7.9375	18	1.411	F
5/16-24	0.3125	7.9375	24	1.058	I
3/8-24	0.3750	9.5250	24	1.058	Q
3/8-16	0.3750	9.5250	16	1.588	5/16"
7/16-14	0.4375	11.1125	14	1.814	U
7/16-20	0.4375	11.1125	20	1.270	25/64"
1/2-20	0.5000	12.7000	20	1.270	29/64"
1/2-13	0.5000	12.7000	13	1.954	27/64"

Bolt Diameter	Standard (")	Metric (mm)
1/8	5/16	8
3/16	3/8	10
1/4	7/16	11
5/16	1/2	13
3/8	9/16	14
7/16	5/8	16
1/2	3/4	19
9/16	13/16	21
	7/8	22
5/8	15/16	24
	1	25
3/4	1-1/8	29
	1-11/16	32
7/8	1-5/16	34
	1-3/8	35
1	1-1/2	38
	1-5/8	41
1-1/8	1-11/16	43
	1-3/4	45
1-1/4	1-7/8	48
1-3/8	2	51
1-1/2	2-1/4	57
1-5/8	2-1/2	64
1-3/4	2-5/8	67
	2-3/4	70
1-7/8	2-15/16	75
	3	76
2	3-1/8	80
	3-1/4	83
2-1/4	3-1/2	89
	3-3/4	95
2-1/2	3-7/8	99
	4	102
2-3/4	4-1/4	108
	4-1/2	114
3	4-5/8	118
3-1/4	5	127
3-1/2	5-3/8	137
	5-1/2	140
3-3/4	5-3/4	146
	6	152
	6-1/2	165
	7	178

Size	Decimal Equivalent	Size	Decimal Equivalent	Size	Decimal Equivalent	Size	Decimal Equivalent
97	0.0059	2.60 mm	0.1024	M	0.295	63/64"	0.9844
96	0.0063	37	0.104	7.50 mm	0.2953	1"	1
95	0.0067	2.70 mm	0.1063	19/64"	0.2969	25.50 mm	1.0039
94	0.0071	36	0.1065	7.60 mm	0.2992	1-1/64"	1.0156
93	0.0075	2.75 mm	0.1083	N	0.302	26.00 mm	1.0236
92	0.0079	7/64"	0.1094	7.70 mm	0.3031	1-1/32"	1.0312
91	0.0083	35	0.11	7.75 mm	0.3051	26.50 mm	1.0433
90	0.0087	2.80 mm	0.1102	7.80 mm	0.3071	1-3/64"	1.0469
89	0.0091	34	0.111	7.90 mm	0.311	1-1/16"	1.0625
88	0.0095	33	0.113	5/16"	0.3125	27.00 mm	1.063
.25 mm	0.0098	2.90 mm	0.1142	8.00 mm	0.315	1-5/64"	1.0781
87	0.01	32	0.116	O	0.316	27.50 mm	1.0827
86	0.0105	3.00 mm	0.1181	8.10 mm	0.3189	1-3/32"	1.0938
85	0.011	31	0.12	8.20 mm	0.3228	28.00 mm	1.1024
84	0.0115	3.10 mm	0.122	P	0.323	1-7/64"	1.1094
.30 mm	0.0118	1/8"	0.125	8.25 mm	0.3248	28.50 mm	1.122
83	0.012	3.20 mm	0.126	8.30 mm	0.3268	1-1/8"	1.125
82	0.0125	3.25 mm	0.128	21/64"	0.3281	1-9/64"	1.1406
.32 mm	0.0126	30	0.1285	8.40 mm	0.3307	29.00 mm	1.1417
81	0.013	3.30 mm	0.1299	Q	0.332	1-5/32"	1.1562
80	0.0135	3.40 mm	0.1339	8.50 mm	0.3346	29.50 mm	1.1614
.35 mm	0.0138	29	0.136	8.60 mm	0.3386	1-11/64"	1.1719
.36 mm	0.0142	3.50 mm	0.1378	R	0.339	30.00 mm	1.1811
79	0.0145	28	0.1405	8.70 mm	0.3425	1-3/16"	1.1875
.38 mm	0.015	9/64"	0.1406	11/32"	0.3438	30.50 mm	1.2008
1/64"	0.0156	3.60 mm	0.1417	8.75 mm	0.3445	1-13/64"	1.2031
.40 mm	0.0157	27	0.144	8.80 mm	0.3465	1-7/32"	1.2188
78	0.016	3.70 mm	0.1457	S	0.348	31.00 mm	1.2205
.42 mm	0.0165	26	0.147	8.90 mm	0.3504	1-15/64"	1.2344
.44 mm	0.0173	3.75 mm	0.1476	9.00 mm	0.3543	31.50 mm	1.2402
.45 mm	0.0177	25	0.1495	T	0.358	1-1/4"	1.25
77	0.018	3.80 mm	0.1496	9.10 mm	0.3583	32.00 mm	1.2598
.46 mm	0.0181	24	0.152	23/64"	0.3594	1-17/64"	1.2656
.48 mm	0.0189	3.90 mm	0.1535	9.20 mm	0.3622	32.50 mm	1.2795
.50 mm	0.0197	23	0.154	9.25 mm	0.3642	1-9/32"	1.2812
76	0.02	5/32"	0.1562	9.30 mm	0.3661	1-19/64"	1.2969
75	0.021	22	0.157	U	0.368	33.00 mm	1.2992
.55 mm	0.0217	4.00 mm	0.1575	9.40 mm	0.3701	1-5/16"	1.3125
74	0.0225	21	0.159	9.50 mm	0.374	33.50 mm	1.3189
.60 mm	0.0236	20	0.161	3/8"	0.375	1-21/64"	1.3281
73	0.024	4.10 mm	0.1614	V	0.377	34.00 mm	1.3386
72	0.025	4.20 mm	0.1654	9.60 mm	0.378	1-11/32"	1.3438
.65 mm	0.0256	19	0.166	9.70 mm	0.3819	34.50 mm	1.3583
71	0.026	4.25 mm	0.1673	9.75 mm	0.3839	1-23/64"	1.3594
.70 mm	0.0276	4.30 mm	0.1693	9.80 mm	0.3858	1-3/8"	1.375
70	0.028	18	0.1695	W	0.386	35.00 mm	1.378
69	0.0292	11/64"	0.1719	9.90 mm	0.3898	1-25/64"	1.3906
.75 mm	0.0295	17	0.173	25/64"	0.3906	35.50 mm	1.3976
68	0.031	4.40 mm	0.1732	10.00 mm	0.3937	1-13/32"	1.4062
1/32"	0.0312	16	0.177	X	0.397	36.00 mm	1.4173
.80 mm	0.0315	4.50 mm	0.1772	Y	0.404	1-27/64"	1.4219
67	0.032	15	0.18	13/32"	0.4062	36.50 mm	1.437
66	0.033	4.60 mm	0.1811	Z	0.413	1-7/16"	1.4375
.85 mm	0.0335	14	0.182	10.50 mm	0.4134	1-29/64"	1.4531
65	0.035	13	0.185	27/64"	0.4219	37.00 mm	1.4567
.90 mm	0.0354	4.70 mm	0.185	11.00 mm	0.4331	1-15/32"	1.4688
64	0.036	4.75 mm	0.187	7/16"	0.4375	37.50 mm	1.4764
63	0.037	3/16"	0.1875	11.50 mm	0.4528	1-31/64"	1.4844
.95 mm	0.0374	4.80 mm	0.189	29/64"	0.4531	38.00 mm	1.4961
62	0.038	12	0.189	15/32"	0.4688	1-1/2"	1.5
61	0.039	11	0.191	12.00 mm	0.4724	1-33/64"	1.5156
1.00 mm	0.0394	4.90 mm	0.1929	31/64"	0.4844	38.50 mm	1.5157
60	0.04	10	0.1935	12.50 mm	0.4921	1-17/32"	1.5312
59	0.041	9	0.196	1/2"	0.5	39.00 mm	1.5354
1.05 mm	0.0413	5.00 mm	0.1969	13.00 mm	0.5118	1-35/64"	1.5469
58	0.042	8	0.199	33/64"	0.5156	39.50 mm	1.5551
57	0.043	5.10 mm	0.2008	17/32"	0.5312	1-9/16"	1.5625
1.10 mm	0.0433	7	0.201	13.50 mm	0.5315	40.00 mm	1.5748
1.15 mm	0.0453	13/64"	0.2031	35/64"	0.5469	1-37/64"	1.5781
56	0.0465	6	0.204	14.00 mm	0.5512	1-19/32"	1.5938
3/64"	0.0469	5.20 mm	0.2047	9/16"	0.5625	40.50 mm	1.5945
1.20 mm	0.0472	5	0.2055	14.50 mm	0.5709	1-39/64"	1.6094
1.25 mm	0.0492	5.25 mm	0.2067	37/64"	0.5781	41.00 mm	1.6142
1.30 mm	0.0512	5.30 mm	0.2087	15.00 mm	0.5906	1-5/8"	1.625
55	0.052	4	0.209	19/32"	0.5938	41.50 mm	1.6339
1.35 mm	0.0531	5.40 mm	0.2126	39/64"	0.6094	1-41/64"	1.6406
54	0.055	3	0.213	15.50 mm	0.6102	42.00 mm	1.6535
1.40 mm	0.0551	5.50 mm	0.2165	5/8"	0.625	1-21/32"	1.6562
1.45 mm	0.0571	7/32"	0.2188	16.00 mm	0.6299	1-43/64"	1.6719
1.50 mm	0.0591	5.60 mm	0.2205	41/64"	0.6406	42.50 mm	1.6732
53	0.0595	2	0.221	16.50 mm	0.6496	1-11/16"	1.6875
1.55 mm	0.061	5.70 mm	0.2244	21/32"	0.6562	43.00 mm	1.6929
1/16"	0.0625	5.75 mm	0.2264	17.00 mm	0.6693	1-45/64"	1.7031
1.60 mm	0.063	1	0.228	43/64"	0.6719	43.50 mm	1.7126
52	0.0635	5.80 mm	0.2283	11/16"	0.6875	1-23/32"	1.7188
1.65 mm	0.065	5.90 mm	0.2323	17.50 mm	0.689	44.00 mm	1.7323
1.70 mm	0.0669	A	0.234	45/64"	0.7031	1-47/64"	1.7344
51	0.067	15/64"	0.2344	18.00 mm	0.7087	1-3/4"	1.75
1.75 mm	0.0689	6.00 mm	0.2362	23/32"	0.7188	44.50 mm	1.752
50	0.07	B	0.238	18.50 mm	0.7283	1-49/64"	1.7656
1.80 mm	0.0709	6.10 mm	0.2402	47/64"	0.7344	45.00 mm	1.7717
1.85 mm	0.0728	C	0.242	19.00 mm	0.748	1-25/32"	1.7812
49	0.073	6.20 mm	0.2441	3/4"	0.75	45.50 mm	1.7913
1.90 mm	0.0748	D	0.246	49/64"	0.7656	1-51/64"	1.7969
48	0.076	6.25 mm	0.2461	19.50 mm	0.7677	46.00 mm	1.811
1.95 mm	0.0768	6.30 mm	0.248	25/32"	0.7812	1-13/16"	1.8125
5/64"	0.0781	1/4" E	0.25	20.00 mm	0.7874	1-53/64"	1.8281
47	0.0785	6.40 mm	0.252	51/64"	0.7969	46.50 mm	1.8307
2.00 mm	0.0787	6.50 mm	0.2559	20.50 mm	0.8071	1-27/32"	1.8438
2.05 mm	0.0807	F	0.257	13/16"	0.8125	47.00 mm	1.8504
46	0.081	6.60 mm	0.2598	21.00 mm	0.8268	1-55/64"	1.8594
45	0.082	G	0.261	53/64"	0.8281	47.50 mm	1.8701
2.10 mm	0.0827	6.70 mm	0.2638	27/32"	0.8438	1-7/8"	1.875
2.15 mm	0.0846	17/64"	0.2656	21.50 mm	0.8465	48.00 mm	1.8898
44	0.086	6.75 mm	0.2657	55/64"	0.8594	1-57/64"	1.8906
2.20 mm	0.0866	H	0.266	22.00 mm	0.8661	1-29/32"	1.9062
2.25 mm	0.0886	6.80 mm	0.2677	7/8"	0.875	48.50 mm	1.9094
43	0.089	6.90 mm	0.2717	22.50 mm	0.8858	1-59/64"	1.9219
2.30 mm	0.0906	I	0.272	57/64"	0.8906	49.00 mm	1.9291
2.35 mm	0.0925	7.00 mm	0.2756	23.00 mm	0.9055	1-15/16"	1.9375
42	0.0935	J	0.277	29/32"	0.9062	49.50 mm	1.9488
3/32"	0.0938	7.10 mm	0.2795	59/64"	0.9219	1-61/64"	1.9531
2.40 mm	0.0945	K	0.281	23.50 mm	0.9252	50.00 mm	1.9685
41	0.096	9/32"	0.2812	15/16"	0.9375	1-31/32"	1.9688
2.45 mm	0.0965	7.20 mm	0.2835	24.00 mm	0.9449	1-63/64"	1.9844
40	0.098	7.25 mm	0.2854	61/64"	0.9531	50.50 mm	1.9882
2.50 mm	0.0984	7.30 mm	0.2874	24.50 mm	0.9646	2"	2
39	0.0995	L	0.29	31/32"	0.9688
38	0.1015	7.40 mm	0.2913	25.00 mm	0.9843

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